Combined waste-heat boiler and chemical recovery unit

Claim 1

A COMBINED WASTE HEAT BOILER AND CHEMICAL RECOVERY UNIT COMPRISING: MEANS DEFINING AN UPRIGHT COMBUSTION CHAMBER HAVING A CEILING; MEANS FOR INTRODUCING CHEMICAL CONTAINING COMBUSTIBLES INTO THE COMBUSTION CHAMBER TO BE BURNED THEREIN AND TO HAVE THE CHEMICAL TO BE RECOVERED ACCUMULATE UPON THE FLOOR OF THE COMBUSTION CHAMBER; MEANS DEFINING A DISCHARGE OPENING AT THE BOTTOM OF THE COMBUSTION CHAMBER FROM WHICH THE ACCUMULATED CHEMICAL MAY BE DISCHARGED AS A LIQUID; A PLURALITY OF SUBSTANTIALLY HORIZONTAL BOILER FLUID CONTAINING TUBES PROVIDING SUPPORTING MEMBERS NEAR THE CEILING OF THE COMBUSTION CHAMBER; A GROUP OF SIDE-BYSIDE SERPENTINE COILS HANGING FROM SAID SUPPORTING MEMBERS WITH THEIR LEGS VERTICAL AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED ACROSS THE HORIZONTAL AREA OF THE COMBUSTION CHAMBER TO PROVIDE A MAZE OF VERTICAL COOLING SURFACES IN THE UPPER PORTION OF THE COMBUSTION CHAMBER; HEADERS AT THE TOP OF THE COMBUSTION CHAMBER TO WHICH THE ENDS OF EACH SERPENTINE COILS ARE CONNECTED AND WHEREBY BOILER FLUID MAY BE CIRCULATED THROUGH THE SERPENTINE COILS; MEANS DEFINING A GAS PASS LEADING FROM THE UPPER PORTION OF THE COMBUSTION CHAMBER, THE ENTRY TO SAID GAS PASS BEING ABOVE THE BOTTOM OF SAID GROUP OF SERPENTINE COILS SO THAT THE COMBUSTION GASES LEAVING THE COMBUSTION CHAMBER MUST FLOW BETWEEN SAID COILS TO REACH THE GAS PASS WHEREBY CHEMICAL-CONTAINING FLY ASH ENTRAINED IN SAID COMBUSTION GASES IMPINGES THE COILS TO ACCUMULATE THEREON; AND MEANS FOR VIBRATING SAID COILS OF DISLODGE ACCUMULATED FLY ASH FROM THE COILS IN PIECES OF SUFFICIENT SIZE AND WEIGHT TO DROP TO THE BOTTOM OF THE COMBUSTION CHAMBER FOR REPROCESSING.